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Effects of treatments on lymphoid organs of piglets. (A) Lymph node and (B) Spleen lesion score. Values are mean ± SD for six animals. a,bMean values with unlike letters are significantly different by Tukey’s test (P < 0.05). OAFA, blend of organic acids and cinnamaldehyde; OAFA1, basal diet supplemented with 1 kg OAFA/ton feed; OAFA2, basal diet supplemented with 2 kg OAFA/ton feed.
